Automobile charger

ABSTRACT

A novel automobile charger which comprise a direct current voltage, wherein a positive pole of the direct current voltage is connected with one end or lead of a DC to DC module, one end of a battery voltage detection module and one end of a load module simultaneously, while a negative pole of the battery is connected with the other end of the DC to DC module, one end of a microcontroller, one end of the automobile start control module and the other end of the battery voltage detection module simultaneously. A third end of the DC to DC module is connected with the other end of the microcontroller, the other three ends of which are connected with the third end of the battery voltage detection module, the other end of the automobile start control module and one end of the load detection module respectively. The other end of the load detection module is connected with the third end of the automobile start control module and the other end of the load module simultaneously.

RELATED APPLICATIONS

This application claims the benefit of priority of Chinese applicationno. 201420212173.5 filed Apr. 28, 2014, the entire content of which isincorporated herein by reference.

BACKGROUND

The present disclosure relates to an automobile charging device, inparticular relates to a novel automobile charger with a safe powersupply charging quickly.

Automobile charging is a big issue of traveling by automobile for thoseautomobile fans and businessmen, the maturity of the technology thereofis one of the critical factors restricting the application of theautomobile charger. However, current automobile chargers have commonproblems of not able to automatically detect whether a load isconnected, whether an electrode is connected with an automobile storagebattery reversely, whether an automobile engine or the storage batteryhas a reverse current, whether the battery state is suitable for heavycurrent power generation and so on. Accordingly, the present disclosureprovides a novel automobile charger with the safe power supply chargingquickly to solve the problems mentioned above, thus making theautomobile charging safe, quick, mature and propagable.

SUMMARY

A purpose of the present disclosure aims to provide a novel automobilecharger with the safe power supply charging quickly, in order to solvethe problems presented in the above background.

To achieve the purpose described above, the present disclosure providesthe following technical solutions: a novel automobile charger comprisesa direct current power supply, wherein a positive pole of the directcurrent power supply is connected with one end of a DC to DC module, oneend of a battery voltage detection module and one end of a load modulesimultaneously, while a negative pole of the direct current voltage isconnected with the other end of the DC to DC module, one end of a microcontroller, one end of an automobile start control module and the otherend of the battery voltage detection module simultaneously. A third endof the DC to DC module is connected with the other end of themicrocontroller, and the other three ends of the microcontroller areconnected with the third end of the battery voltage detection module,the other end of the automobile start control module and one end of theload detection module respectively, wherein the other end of the loaddetection module is connected with the third end of the automobile startcontrol module and the other end of the load module simultaneously; theload module which comprises the automobile storage battery and theautomobile engine is located on the end of the load module.

As a further solution of the present disclosure that: the DC to DCmodule provides a stable voltage for the microcontroller which collectsrelevant data to conduct the corresponding control. The battery voltagedetection module conducts the measurement of the batter voltage, theautomobile start control module conducts the power supply or the poweroutage for the load module through the microcontroller, and the loaddetection module which comprises the automobile storage battery or theautomobile engine detects whether the load module is correctlyconnected.

As a further solution of the present disclosure that: the circuitemploys an electronic switch to supply power to the load module, whichcan offer more protection for the product, or reduce the product sizeand the material cost.

As a further solution of the present disclosure that: the batteryvoltage detection module provides protection for the power supplybattery to prevent damages caused by the discharging of the directcurrent power supply.

As a further solution of the present disclosure that: the load detectionmodule prevents improper operations of the user.

As a further solution of the present disclosure that: in the standbymode, the microcontroller closes all outputs when the voltage of thedirect current power supply is lower than that of the state being ableto supply power and then recovers when it is higher than that of thestate being able to supply power.

As a further solution of the present disclosure that: the automobilestart control module is the electronic switch.

Compared to the prior art, the present disclosure has the beneficialeffects that:

1. The present disclosure employs the electronic switch to control thesupply power for the load, this part can offer more protection for theproduct, and reduce the product size and the material cost.

2. The battery detection of the present disclosure can provide lowvoltage protection to prevent damages caused by the over discharging ofthe battery.

3. The load detection of the present disclosure can prevent improperoperations by the user, such as reversed polarity, which causes damagesto the automobile or the direct current power supply.

4. The present disclosure employs the voltage backflow protection forabnormal load, wherein the automobile start line is closed to protectthe battery when the abnormal voltage is detected.

5. The present disclosure has a fast charging function, and can beinstalled fixedly or moved portably according to the use requirements ofpeople.

6. The automatic detection module of the present disclosure canautomatically detects whether the load is connected, whether theelectrode is connected with the automobile storage battery reversely,whether the automobile engine or the storage battery has reversecurrent, whether the battery state is suitable for heavy current powergeneration, thereby protecting the load and the circuit and thus hascomplete functions.

BRIEF DESCRIPTION OF DRAWINGS

FIG. 1 is a block diagram for the principle of the emergency powersupply of the safe intelligent automobile;

FIG. 2 is a circuit diagram for the emergency power supply of the safeintelligent automobile.

In figures: 1—DC to DC module, 2—microcontroller, 3—battery voltagedetection module, 4—automobile start control module, 5—load detectionmodule, 6—load module, 7—direct current power supply.

DETAILED EMBODIMENTS

The technical solutions of the present disclosure will be described moreclearly and fully in conjunction with drawings in the embodiments of thepresent disclosure, and obviously, the described embodiments are merelya part of the embodiments of the present disclosure, not all theembodiments. Based on the embodiments of the present disclosure, all theother embodiments obtained by the ordinary skilled in the art withoutcreative labors belong to the scope claimed by the present disclosure.

Refer to FIG. 1, a novel automobile charger comprises a direct currentpower supply, wherein the positive pole of the direct current powersupply is connected with one end or lead of the DC to DC module, one endof the battery voltage detection module and one end of the load modulesimultaneously, while the negative pole of the direct current voltage isconnected with the other end of the DC to DC module, one end of themicrocontroller, one end of the automobile start control module and theother end of the battery voltage detection module simultaneously. Athird end of the DC to DC module is connected with the other end of themicrocontroller, and the other three ends of the microcontroller areconnected with the third end of the battery voltage detection module,the other end of the automobile start control module and one end of theload detection module respectively, wherein the other end of the loaddetection module is connected with the third end of the automobile startcontrol module and the other end of the load module simultaneously; theload module which comprises the automobile storage battery and theautomobile engine is located on the end of the load module.

Refer to FIG. 2, the DC to DC module comprises a diode D1, a resistorR1, capacitor C1, a HT7530 voltage stabilizing tube, capacitors C2 andC3, wherein the positive pole of the diode D1 is connected with thepositive pole of the battery, the negative pole of the diode D1 isconnected with one end of the capacitor C1 and an IN port of the HT7530voltage stabilizing tube simultaneously through the resistor R1, and anOUT port of the HT7530 voltage stabilizing tube is connected with oneend of the capacitor C2, one end of the capacitor C3 and a VDD port ofthe microcontroller U2, while the other end of the capacitor C1, theother end of the capacitor C2 and the other end of the capacitor C3 aswell as a GND port of the HT7530 voltage stabilizing tube are groundedand connected with the negative pole of the battery simultaneously; a R1port of the microcontroller U2 is connected with the negative pole ofthe battery through a light-emitting diode L1 and a resistor R12 whichare in series connection, a B1 port of the microcontroller U2 isconnected with a EN port of the automobile start control module, a V0port of the microcontroller U2 is connected with the negative pole ofthe battery through a capacitor C4 and a resistor R7 which are inparallel connection, the V0 port is also connected with the VDD portthrough a slide rheostat RT, a V1 port of the microcontroller U2 is alsoconnected with the negative pole of the battery through a resistor 10, acapacitor C6 and a resistor R13 which are in parallel connection, the V1port is connected with the positive pole of the battery through aresistor R2, and is also connected with the negative pole of theautomobile storage battery and the automobile engine simultaneouslythrough a resistor R9, wherein two ends of the automobile storagebattery are in parallel connection with the capacitor C7, resistors R9,10, a capacitor C6 and a resistor R13 to form the load detection moduletogether, a V4 port of the microcontroller U2 is grounded through acapacitor C5, a VSS port of the microcontroller U2 and one end of thecapacitor C4 are grounded simultaneously. The other end of the capacitorC4 is connected with the VDD port of the microcontroller U2, theresistors R2, R13 and capacitor C6 form the battery voltage detectionmodule together, and a Drive port of the automobile start control moduleis connected with the automobile engine and one end of a resistor R14simultaneously, wherein the other end of the resistor R14 is grounded.

The DC to DC module in the present disclosure provides the stablevoltage for the microcontroller which collects relevant data to conductthe corresponding control. The battery voltage detection module conductsthe measurement of the batter voltage, and the automobile start controlmodule conducts the power supply or the power outage for the load modulethrough the microcontroller, wherein the load detection module detectswhether the load module is correctly connected.

The microcontroller in the present disclosure determines whether theautomobile storage battery is connected with the automobile enginethrough the load detection module, wherein the automobile start controlmodel is automatically activated and the battery starts to supply powerto the load module when the load is correctly connected; the automobilestart control model is automatically deactivated and the battery stopssupplying power to the load module when assuming that the load is notconnected or the positive and negative polarities are reverselyconnected. In the standby mode, the microcontroller closes all outputswhen the battery voltage is lower than 9V, and recovers the normaloperation only when the battery voltage is larger than 10V; theautomobile engine will generate the normal voltage to recharge thebattery after the automobile starts, whereas the automobile startcontrol module is deactivated immediately once the recharging voltage islarger than the voltage before that battery starts the power supply, toprotect the battery from damages caused by charging with the normalvoltage; the automobile start control module is the electronic switch,which can prevent the load from being reversely connected and rechargingof the normal voltage, thus protecting the battery and prolonginglifespan.

The automobile engine will generate abnormal voltage to recharge thedirect current power supply after the automobile starts, and theautomobile start control module is deactivated immediately once therecharging voltage is larger than the voltage before the direct currentpower supply starts the power supply, to protect the direct currentpower supply from damages caused by charging with normal voltage charge.

It is obvious for the skilled people in the art that the presentdisclosure is not merely limited to the details of the above exemplaryembodiments, and the present disclosure can be implemented in otherspecific forms without departing from the sprits or the basic featuresof the present disclosure. Thus, no matter to consider from which pointof view, the embodiments should be considered as exemplary andnon-limiting. The scope of the present disclosure is defined by theaccompanying Claims rather than the above description, therefore it isintended that all the changes fallen within the meanings and scope ofthe equivalent elements of the Claims are contained in the presentdisclosure. Any drawing reference in the Claims should not be regardedas limiting the Claims involved.

Furthermore, it should be understood that although the specification isdescribed according to the embodiments, but not every embodimentincludes only an independent technical solution, this manner ofdescription for the specification is only for clarity, therefore theskilled people in the art should take the Specification as a whole, andthe technical solutions in various embodiments can be combinedappropriately to form other implementations understandable for thoseskilled in the art.

1-6. (canceled)
 7. A charger comprising: a battery connected to avoltage regulator, the battery capable of supplying power, via thevoltage regulator, to at least a microcontroller, the battery alsocapable of supplying power to an automobile battery when the battery hasat least a predetermined voltage; a load detector circuit, connected tothe microcontroller, to detect when the charger is correctly connectedto the automobile battery; the microcontroller generating, when thecharger is correctly connected to the automobile battery, an outputsignal; and switching circuitry, including at least one switch, tooperatively connect the battery to the automobile battery when themicrocontroller generates the output signal to supply a charge to theautomobile battery.
 8. The charger of claim 7, further comprising abattery voltage detector circuit to detect a battery voltage of thebattery.
 9. The charger of claim 7, wherein the at least one switch isone or more MOSFETs.
 10. The charger of claim 7, wherein there are aplurality of switches.
 11. The charger of claim 9, wherein the one ormore MOSFETS are n-channel MOSFETs.
 12. The charger of claim 7, whereinthe at least one switch is a plurality of MOSFETs.
 13. The charger ofclaim 12, wherein the plurality of MOSFETs are connected in parallel.14. The charger of claim 8, further comprising a load detector to detecta reverse polarity connection to the automobile battery.
 15. The chargerof claim 14, wherein the microprocessor includes a standby mode whereall outputs are closed.
 16. The charger of claim 15, further wherein themicrocontroller closes all outputs when a voltage of the direct currentpower supply is lower than that of a state being able to supply power.17. The charger of claim 14, wherein the supply power to the automobilebattery is 12 volts.
 18. The charger of claim 12, wherein the pluralityof MOSFETS are connected in a series-parallel topology.
 19. The chargerof claim 8, wherein the predetermined voltage is 10 volts.
 20. Thecharger of claim 15, wherein the charger is in a standby mode when thebattery has less than 9 volts.
 21. The charger of claim 15, wherein thecharger is not in a standby mode when the battery has more than 10volts.
 22. The charger of claim 15, wherein the charger is in a normalmode when the battery has more than 10 volts.
 23. The charger of claim14, further comprising a start control module to prevent recharging of anormal voltage of the battery.
 24. The charger of claim 23, furthercomposing a start control module to stop supplying battery power whenthere is no load.
 25. The charger of claim 24, wherein the at least oneswitch switches a negative voltage.
 26. The charger of claim 24, whereinthe at least one switch is connected to a negative battery terminal. 27.The charger of claim 14, wherein the charger has a fast chargingfunction.
 28. The charger of claim 14, further comprising a voltageback-flow protection.
 29. The charger of claim 28, wherein the voltageback-flow protection is for an abnormal load.
 30. The charger of claim7, wherein the microcontroller determines whether a battery state issuitable for heavy current power generation.